IPx7 and IPx8 water tank
Customers quickly want their product to be tested on, for example, IP67. This is dust-free and immersion-proof (see IP code). We want to test the designs we make for them. Now that we have our own IPx7/Ipx8 water tank, it saves us a lot of time. Because there are queues at the notified bodies. Because we sometimes want to test more often, that saves us a lot of money as well as extra organization, even if you bought a waterproof - IP67 proof - housing, you will have to test (again) every time you work on it. So we can do that in-house now and that saves time.
Read more about EMC analysis here.